function travelTime(input) {
    let travels = {}
    input.forEach(row => {
        let [country, city, miles] = row.split(' > ')
        if (!travels.hasOwnProperty(country)) {
            travels[country] = {}
        }
        if (!travels[country].hasOwnProperty(city)) {
            travels[country][city] = Number.POSITIVE_INFINITY;
        }
        if (travels[country].hasOwnProperty(city)) {
            if (travels[country][city] > Number(miles)) {
                travels[country][city] = Number(miles)
            }
        }

    })
    Object.entries(travels).sort((a, b) => a[0].localeCompare(b[0]))
        .map(row => {
            let rowOne = Object.entries(row[1]).sort((a, b) => a[1] - b[1]).map(x => x.join(' -> '))
            console.log(`${row[0]} -> ${rowOne.join(' ')} `)
        })
}